Propelling mechanism for boats.



H. THOBMBYBR.

PRBPELLING MEUHANISM FOR BOATS. unicum! 7mm lov. s. 1m.

. a annu-annu x. Y 2 a 0 9 @al al dja/15 War/nega' Nm 849,176. ETENTEB APE. 2, 1%?. V H. 'LHRMEYERLV PRGPBLLNG MBGHANISM FR BGTS.

APPLIUATIOH FILED NOV. 5, 1988.

2 SHEETS-SHEET 2.

,ef INVENTOR idw J2 Y llfneys YH: :mams :urnes co.. wasnmawm n c UNITED STATES PATENT OFFICE.

PROF'ELLING MECHANISM FOR BOATS.

Specification of Letters Patent.

Patented April 2, 1907.

ppiicatn filed November 5. 19GB. Seria?? iis. 342,135.

To ad whom t may concern:

Be it known that I, HANS THORMEYER, e, citizen of the Kingdom of Prussia, German Empire, residing et Friedeneu, neer Berlin, Bennigscnstressc 5, ('erin any, have invented certain new end oselul improvements in Propclling Mechanism for Boats, of which the following is a specilicstion, reference being had therein to the accompanying drewings.

My present invention relates to e device for reversing the water-current for ships propellers which are driven by machines only rotating in one direction.

The device consists oi e easing which is open et the bock ond front ends and attached to the stein or stern or to the hotttnn of: the ship. Seid casing is divided hy e partition into two chambers, end these clnnnhcrs ere connected with eseh other by n short pipe or opening. in or in liront oi scid opening the propeller is provided. Said chambers have devices for controlling the iiow of water and are opened and closed according to the direction in which the water llows through the device.

when the propeller is arranged vertically, the closing devices can remain open while ndvancing; but in the cese el the propeller heing arranged horizontcliy the haelt ol the suction-chamber and the front of the pressure-chamber nre closed.

lf the ropelier is disposed vertically, the suction-c'isinher et the front and the pressurc-chmnher et the buck ere closed in driv ing backward. The current of witter moet then enter the suction-chamber et the haelt and pass ont of the pressure-chamber at the front, so that the current ol` weter will drive the ship backward. In the event ol the propeilcr boing disposed horizontally the suction-chninher et the front and the pressure-chamber et the rear are closed in driving backward.

in the accompanying drawings, illustroting the invention by Way of example, Figure 1 is e longitudinal dicgrennnetic section; Fig. 2, a. vertical section showing both of the chambers open for driving forward; F ig. 3, e vertical section showing the chenibers open on one side and closed on the other for driving backward. Fig. 4 is a horizontal section through the center of the propeller-shaft according to Fig. 2; Fig. 5, a section on the line B of Fig. 2; Fig. 6, e.

section on he line C i) ci Fig. 2; Fig. 7, e, section on the line E F oi Fig. 12. Fg. 8 is e. view siniiier to F ig. l, illnstreting e. inodiiication in the constructimi. Fig. is e. vertical section of the niodilied strnctnro shown in Fig. Fig. 1() is o verticni section of the improved device with the ports nrrenged for moving forward. Fig. il is a verliest section of the improved device with the ports arranged for moving rearwardly. Fig. 12 is s vertical section ot the improved device with the parts arranged l'or stopping the vessel, the operation oi the propeller being neutralized by the centrati position of the closing devices.

ln :dl the figures the direction ofthe flow of water in the various positions el' the closing devices is represented by errows, and the seine letters of reference orc used in eli the Iigures.

The device is supposed to he atl ached to the stern of the ship.

i is the which is divided into two chambers c d h v the partit ion o. Seid channbcrs c d communicate with erich other through the short pipe in which the propeller il: iS disposed. At the iront of the cheminer c :i closing device j" is provided, and the chainher d hns e similar closing device j at the bock. The cioeing devicesj" con he connected with each other by rods g. s is the stern oi the ship, r the rudder, and fi e grating to prevent foreign bodies from passing to the propelier.

The operation of the device is ns ioilows: in order to advance, the devices j jLi are opened, Fig. Z2. The water then enters the chambers c d et the front and is driven out et the hack, so that the ship is advanced. For the purpose of driving backward the devices Ffa are ciosed, in which cese the propeller, which rotetes in the same direction :is before, sucks the Water into the chamber c, which is opened et the beck, and drives said Water through the opening b into the ehomherd, out oi which it lions forward, thus propelling the ship backward.

in order to use the invention for propcllers rotating in e. horizontal plone, the opening or short pipe o, connecting the chambers c a'., must be disposed verticeiiy, as shown in Figs. 8 to 12, and with the propeller also disposed horizontaiiy. The devices f f2 employed in the structures shown in Figs. 8 to 12 are adopted to he moved bodily und loter- IIS ally past the ends of the division member a, and thus serve to direct the currents in any desired direction, the parts f f2 in all of the modiiications operating in substantially the saine manner and producing the same results. y

That I claim, and desire to secure by Letters Patent of the United States, is-

1. A device for reversing the direction of the water in driving ships by propellers rotating in one direction, comprising in combination a casing, a partition dividing saidfcasing into two chambers and having an opening connecting said chambers with each other, a propeller rotating in said opening7 and closing devices adapted to open andiigclosesaid chambers at the front and rear, substantially as, and for the purpose, set forth.

2. A device for reversing the direction of the Water in driving ships by propellers ro tating in one direction, comprising in combination a casing, e partition dividing said cssing into two chambers and having un opening connecting said chambers with each other and containing seid propeller, closing devices in said chambers7 und means connecting said closing devices together, substantially as, and for the purpose, set forth.

In testimony whereof I have allixcd my signatur(` in the presence ol two witnesses.

HAN S TlfIUlMEYEli.

Iitnesses HENRY l-IAsPER, lVoLDEMAR HAUPT. 

